Lake Natron, Tanzania
Microorganisms that thrive on salt flock to this lake, producing a red pigment which colorizes the water. The lake contains so much salt that if other animals took a dip in the water they would calcify, essentially turning to stone.
Skaftafell Ice Cave, Iceland
Although not a permanent structure, this ice cave forms at the edge of glaciers when flowing water melts a hole into the glacier. The ice absorbs all light except for blue, creating the indigo glow.
Reed Flute Caves, China
The breathtaking stalactites, stalagmites and pillars were created through water erosion beautifully decorating this 240-meter-long cave.
Yuanyang County, China
Farming is to thank for the enchanting landscapes of Yuanyang county. Rice fields cover the Ailao Mountains.
Lake Hillier, Australia
Algae and bacteria produce the pink dye that decorates this lake. Although very bright, the water is safe for wildlife and humans.
Grand Prismatic Hot Spring, Wyoming
The pigmented microbes that grow on the edges of the water color the Grand Prismatic Hot Spring.
Caño Cristales River, Colombia
Dubbed "the most beautiful river in the world," the extremely varied flora and fauna color the body of water red, yellow, green and black.
Tianzi Mountains, China
Look familiar? These extremely tall and thin mountains were used in "Avatar."
Sentinels of the Arctic, Finland
These magnificent ice sculptures are actually trees covered in ice. The temperature here can fall below -40 degrees Fahrenheit.
Patagonia Marble Caves, Chile
The marbled swirls on the walls of this cave were formed by thousands of years of crashing waves.
Underwater River, Cenote Angelita, Mexico
Beneath the water of Cenote Angelita lies another body of water — a flowing river. Because the river's water is filled with hydrogen sulfate (a heavier substance than salt water), the water sinks to the bottom, creating an underwater river.